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• Page 1 of 2 FORMER ARCO #6100 • G Path to Closure Plan Gd' FOTRACKER HOME --------- 1 E RT I5 RC IJ. SII _._.. --- - OPEN-ASSESSMENT REMEDIAL ACTION FORMER ARCO#6100(70607700192)-MAP THIS 511b NUPOV SIGT nREPORT , Hi AGENOIE$ 25775 PATTERSON PASS RDS errnnFS R PE ORT C SAENtlRKEPo3 A!GOARTNEI'SSUPERNSOR:ADRIENNE ELLSAESSER TRACY,CA 95376 PUBLIC WEEPAGE CENTRAL VALLEY RWDCB(REGION%)-CASE p:390135 SAN JO IN COUNTY CASEWORNEPo!ax:SeaRTON-SUPERVISOR:CORI CONDON UMM PV FOR THIS SITE CUP Gaim k.9513 CUP Pdodty Asnietrotl:D CUF Amoum Paltl:$Q THIS PROJECT WAS LAST MODIFIED BY Hd IN KNOLL ONIIR/1m33:16:1]AM-by$$QBY THIS SITE HAS SUBMITTALS.CUCKH=TO OPEN A NEW WINDDW WITH THE SUBMITTAL APPROVAL PAGE FORTHIS SITE. Path to Closure Plan-FY 12/13 THIS VERSION IS W PROGRESS AS OF 1ag6 3 PATH TO CLOSURE HISTORY cI EaE PATH TO LDS IN PLAN IMPEDIMENT I: Generel Crlterla A:The unauthorized release is NOT located within the service area of a public water [-J Procsdurel Impediment-)gam system ON DALE Step to Resolve Impediment an ou-sit- Step 1:-DELTE STFP �I�6 The site has an on-site public vete[ system[hat is serving the facility. it must be tlemostratetl t"nit that the well will not become impacted. PPn¢ I IMPEDIMENT 2: r Procedurallmpadiment-Wro G I Crits ria D:Free product has NOT been removed to the maximum extent practicable 'J -.S COMPLETION DAIS Stepto Rendve(SVS/1metrt is pandir, F S P must ba must be impl>Q,aen[etl ASAP. Free protlucta In HW15 ottn FCTED DATE monitored (Sproduet is removed when .2f-sits and '\ monitored and product removed xhen found. _.. .--J ADD ADDITIONAL STEP IMPEDIMENT 3: F Procedural lmpatllment-wPO General Criteria F:Secondary source has NOT been removed to the extent practicable COMPLETION DAIS Step to Resolve Impediment 3-Ste 1:-D T 2013 according to RP's consultant Remediation (SVe/IAS) off-site must be isplimentetl. Startup by Nov. 1, ROJEC� A TUA D A=cadis. Ann ADDITIONAL STEP IMPEDIMENT 4: Med-aSoec'RC Criteria-Groundwater:The contaminant plume that exceeds we quality objectives Is r Procedural Impediment-IL+F3 NOT stable or decreasing In areal extent,and does NOT meet all of the additional characteristics of one of the five classes of sites. Conditions that do not meet the policy criteria: • Plume Length(That Exceeds Water Quality Objectives):2 250 Feet and 1,000 Feet • Benzene Concentration:>_3,000 Pg/I 5 760 Feet • Nearest Supply Well(From Plume Boundary): COMpU TION DATE Step to Resolve lmpeNmetd 4-Step 11- a a, and (SVE/IM) off-site moa Remetliation t be irtplimented ASAP to reduce contaminant concentrations, ma I TED GATE A a c Dara both on-site and Off-site.startup Ey Nov. 1, 2013 according to "Is migration in soil and groundwater consultant urcadis. __. - ----' -- —" - ADDADDIPONAL STEP IMPEDIMENT 5: Medi SDecifc Cdte la•Direct Contact rad Outdoor Air Exp_osurs:The site Is NOT considered low-threat fl Procetlural Impediment-\INFO fordirectcomactandGIN 00rauexpo�ureaslttloesNOTmeet 1,2,or3. Conditions that do not meet the policy criteria: • Exposure Type:Utility Worker S �` • Petroleum Constituents in Solu>6 Feet bgs and 510 Feet bgs 0lp y • Soil Concentrations of Benzene:>14 mg/kg A • Soil Concentrations of EthylBenzene:>89 mg/kg and 5134 mg/kg 4 • Soil Concentrations of Naphthalene:Unknown • Soil Concentrations of PAH:Unknown COMPLETION DATE $tap to Resolve lm ImeMS-Step 1:-^F mentedP Oncentrations in soil ASAP. Perform a hwan health a•nm ACTU Remetliation IeVE/IA51 rami be residual t0 reduce c contamination - - assessment fo= shallow reaitlual contamination on-site and a soil management plan v[ tisk s left in place following active remediation. _ tx)ADDITIONAL STEP REQUIREMENTS ALONG PATH TO CLOSURE PUBLIC WELL DATE IDENTIFIED RP NOTIFICATON PARTICIPATION DESTRUCTION w°5 LAND E IT CLOSURE https://geotracker.waterboards.ca.gov/regulators/screens/closure_policy.asp?global id=TO... 12/4/2013